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UNIDENTIFIED MALE: It went to 4,500 meters. Once it that max step, it said, hey, this is deeper than I am programmed to be.

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CHRIS CUOMO, CNN ANCHOR: Breaking overnight, what went wrong with the first underwater mission to find Flight 370? Is the ocean too deep to search?

Plus, more mixed signals from Malaysian investigators. Now they say a cell phone signal was picked up on board and it was the co-pilot's.

KATE BOLDUAN, CNN ANCHOR: One on one, President Obama and Putin talking directly as the situation in Ukraine worsens. And a Russian jet flies uncomfortably close to a U.S. warship. Are they any closer to a diplomatic solution?

MICHAELA PEREIRA, CNN ANCHOR: Boston strong. Today marks one year since the marathon bombing. We remember those who were lost and those whose strength helped the city bounce back.

CUOMO: Your NEW DAY starts right now.

Good morning. Welcome to NEW DAY. It's Tuesday, April 15th, tax day, 6:00 in the east now. The Bluefin 21 underwater drone expected to dive into the Indian Ocean today after Monday's deployment cut short because the submersible exceeded its depth limit.

BOLDUAN: That signal that came from the co-pilot's cell phone while in flight is raising many new questions this morning. We're doing to dive into all of that with our experts in just a moment. But first, let's get to Erin McLaughlin who is following all the new developments for us live in Perth, Australia. Good morning, Erin.

ERIN MCLAUGHLIN, CNN CORRESPONDENT: Good morning, Kate. That's right. The Bluefin-21 cut its mission short after encountering waters deeper than it's designed to handle. Prompting the questions, can it handle the task at hand?

(BEGIN VIDEOTAPE) MCLAUGHLIN: Breaking overnight, U.S. Navy officials say no objects of interest were found among the data downloaded from their unmanned underwater robot, this as the first subsurface search was cut short. Just six hours into its mission, the Bluefin-21 surfaced, 14 hours early. The Bluefin was originally expected to scour the ocean floor for debris. The whole journey lasting 20 hours. But instead, the device resurfaced after the officials say it exceeded its maximum operating depth of 14,800 feet.

UNIDENTIFIED MALE: We just hit a deeper spot than we initially planned so we just got to bring it up, reprogram it, shift a little bit away from the deeper area, and adjust our search pattern.

MCLAUGHLIN: Meanwhile, a new detail emerging, a U.S. official tells CNN the co-pilot's cell phone was on during the flight and made contact with the Malaysian cell tower. According to information shared by Malaysian investigators. That cell phone signal reportedly detected about 30 minutes after the plane made that sharp westward turn, around the time the aircraft disappeared from radar.

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MCLAUGHLIN: We're now hearing that the Bluefin-21 actually spent 7- 1/2 hours in the water. Officials say that it could take up to two months for it to search the entire area -- Chris.

CUOMO: Erin, thank you very much. Let's bring in CNN aviation analyst and former inspector general for the U.S. Department of Transportation Mary Schiavo and CNN safety analyst, former AAA inspector, David Soucie and author of that great book. What's the title again?

DAVID SOUCIE, CNN SAFETY ANALYST: "Why Planes Crash."

CUOMO: Mary Schiavo, OK, you play the role of investigator here from Malaysia. How can you say that you don't pick up any cell phone information, it's not that hard to figure it out, and now weeks into the investigation you say you did and it was the co-pilot's? How do you make this type of mistake?

MARY SCHIAVO, CNN AVIATION ANALYST: Well, you make this type of mistake if, one, you're not on top of your investigation and one hand doesn't know what the other hand is doing. And this piece of information had apparently gone to other authorities to investigate. As the head of the investigation, you should know where all of your data is. I think they did not. I think they weren't on top of their investigation.

Clearly that makes us all wonder is there any other cell phone information. It's hard to believe 239 people didn't have 239 cell phones. I confessed I have left mine on in flight many times before. I think they have terrible problems of coordination.

CUOMO: You've left it on or kept it on, on purpose?

SCHIAVO: By accident. That's my story and I'm sticking to it. CUOMO: Mary is a lawyer. Among 15 other things.

SOUCIE: I won't write a violation.

COUMO: Mary raises all the valid issues here. If you find one, first of all, this is not difficult. This is not sophisticated. This is not 20,000 leagues under the sea type of stuff that we're dealing with, with the Bluefin. Finding out whether or not there were any plays off cell phone towers is easy. So the question is, how did they not know or did they know and conceal it and Mary's point, if you find one, why wouldn't you have found others?

SOUCIE: Well, and I'm not -- look at the report and they said that they confirmed that the co-pilot's cell phone did connect. They didn't say others didn't connect and I need to get that specified first. They way reported it wasn't clear, it wasn't complete. Amazing.

COUMO: You can't connect up high.

SOUCIE: Well, I've heard as much as 18,000 feet. I have a friend who flies that area a lot and one time he left his own and received text message about 18,000 feet in that same area. So it's possible that it did connect at a little bit higher altitude but certainly not 35,000 feet.

CUOMO: But what would have to be happening? You know, I'm not in the business of speculation. I don't like it, but just to test the idea of why you would need a cell phone when you have all of this other communications equipment, how disastrous a scenario would you have to be experiencing, Mary, that that was your only recourse?

SCHIAVO: Well, it would have to be a very serious disaster. It would have to be a disaster that involved losing your communications equipment. You give "Good night Malaysian 370" and then you have a disastrous event that knocks out your communications and it's on event that's on going. The pilot turns around to head back to land and says, well, I'll see if we can get a signal, see if you can get a cell phone signal co-pilot because we don't want to be cruising into Malaysian airspace and have the military shoot us down.

Because some of the procedures to identify to the tower that you have no communications involve things that can only be seen during the day, like movement of your wings, et cetera. So it might have been an attempt to try to reach the cell phone tower.

CUOMO: Obviously it's fueled a lot of nefarious speculation. We have to find out what the full, complete understanding of cell phone activity is before we walk down that road. Let's go to something we do know. Bluefin-21, you both told me the reason you need the Alvin is that its depth limited, the Bluefin-21, and that's what they experienced yesterday. Not about the mess-up in the search. Not about something unanticipated. This is what happens as you learn more about the depth you're dealing with.

SOUCIE: That's right. This area is not something that's mapped in detail. In fact, it changes over time with sand and silt and everything that moves. So the fact that they found that it was too deep, we kind of expected. It was right on the fringe of what this machine could do.

CUOMO: The one decision now that you can scrutinize a little bit, Mary, though is you recalibrate the Bluefin-21, but did they call for the Alvin also, I mean, shouldn't they be anticipating that depth an issue and they need a better vehicle?

SCHIAVO: Well, I don't know if they've actually officially called for the Alvin. I know at least a couple days ago in the Chinese media, the Chinese said that they had the "Sea Dragon" and they were anticipating or they were going to plan to deploy that one. And that one holds the world's record for dives, and it's a man dive. So they can -- they've already offered that.

SOUCIE: What I don't know is if it has sonar capabilities though. Those are typically visual machines and under there there's not a lot of sight so you would have to be very close to the debris to find it.

CUOMO: So you need the sonar because you need to do it by feel and bounce back and understand the area.

SOUCIE: Yes.

CUOMO: So these are all things they can deal with if they didn't anticipate it correctly. There it makes sense because of the variable depths.

SOUCIE: Yes, there are machines to do it, maybe that's not the one for the application.

CUOMO: And I'm asking for it this way obviously because we want to be careful not to criticize as we scrutinize. There a lot of variables here that you are not going to know until empirically you go and test and that's what they dealt with yesterday. Fair point, Mary?

SCHIAVO: Fair point. That could explain the cellphones, too. What may have happened is they knew the pilot's cellphone number so they went looking for that. Maybe they haven't gathered all the 237 other cellphones and hadn't looked yet. There may be a mistake on the investigation, but there's still time to do that.

CUOMO: I'm just saying from the family's perspective. They're so on edge that they're not getting accurate information. This is something that can be known. Yes, it's curious that pilots would have their cell phones on. Yes, it would make you wonder why it would be necessary. You would think you would gotten it right by now. That's all.

SOUCIE: That's right. Thirty years ago, I did an investigation and I was able to get cell phone records immediately. On the approach pass someone was using their cell phone during the accident. I was able to get those records 30 years ago, very quickly, like within an hour. This date, why didn't they know I can't figure it out. CUOMO: One thing we all know here is that in an investigation where you may not get answers to every question you better hope that the integrity of your search and your investigation is impeccable because otherwise people will be upset forever. Mary Schiavo, David Soucie, we'll have you back in a little bit -- Kate.

BOLDUAN: Thanks, Chris. Now to Ukraine, a country on the brink. President Obama spoke with Russian President Vladimir Putin by phone on Monday. The violence in Ukraine though is getting worse and the U.S. is publicly accused Russia of fostering much of it.

Phil Black is on the ground for us in Ukraine, but let's begin at the White House with White House correspondent, Michelle Kosinski for more on that phone call between leaders. What do we know about it, Michelle?

MICHELLE KOSINSKI, CNN WHITE HOUSE CORRESPONDENT: OK, this is the second time in two weeks that Presidents Obama and Putin have spoken. The White House described the call as frank and direct with President Obama expressing grave concern for what he called Russian government support of those armed militants who have taken over buildings across Eastern Ukraine and urging Putin to convince them to stop, saying that there is still room for diplomacy here, but that it won't work.

And what the White House called an environment of Russian military intimidation, provocation, armed provocation within Ukraine, and escalatory rhetoric by the Kremlin. As usual the Kremlin saw this call as very different, denying its own involvement, blaming the violence on the Ukrainian government and urging President Obama to use American influence to prevent more violence.

There are these four-party talks this week coming up in Geneva, Russia, Ukraine, the U.S., and the EU. So if there really is room for diplomacy here that would be the time and place for it -- Kate.

BOLDUAN: It does seem to be -- they do seem to be running short on time for that diplomacy at this point. Michelle, thank you very much. Michelle Kosinski live from the White House.

So that phone call Michelle is talking about comes just days after a Russian jet made several very close passes by a U.S. Navy warship in the Black Sea. Meanwhile, separatist groups occupying government buildings in Eastern Ukraine have completely ignored it appears Kiev's demand that they leave.

CNN's Phil Black is joining us now from Eastern Ukraine with much more on this side of the story -- Phil.

PHIL BLACK, CNN CORRESPONDENT: Kate, good morning. This morning the Ukrainian government says it launched what it describes as an anti- terror operation. This is in a region surrounding the city of Donetsk in the south eastern of the country. We don't know the size and scale of the operation, but they say they're taking it slow and gradually they've been talking about doing this for a few days now.

They've tried setting ultimatums, deadlines. All of it hasn't really worked as the pro-Russian militants and supporters have increasingly consolidated their power, occupying key pieces of infrastructure in some nine to ten cities and towns across this region now.

So now they're attempting what they say is an anti-terror operation. In addition to this we've heard the suggestion from the Ukrainian government to bring in international peace keepers under United Nations mandate. Soldiers from perhaps western governments here in the east of the country standing off against Russian forces across the border.

You have to think that's a hard sale. In addition to that it would require a United Nations Security Council resolution. That's where Russia has a veto, which would almost certainly deploy, but what Ukraine is saying here is that it still needs more support from the international community to stop this country from breaking up and to deal with the threat it believes is still coming from Moscow. Chris, back to you.

CUOMO: Phil, that much is clear. Thank you for the reporting this morning.

Now, today marks one year since the Boston marathon bombings. Three lost their lives, 260 injured have their lives changed forever. Vice President Biden will attend a memorial to honor the fallen and first responders as the city pauses to remember and unite in the spirit of being Boston strong. CNN's Jason Carroll is live in Boston this morning. Hi, Jason.

JASON CARROLL, CNN CORRESPONDENT: Good morning to you, Chris. Today what we're going to see is a tribute. The city will come together and pay their respects, honor all of those who suffered and paid with their lives that day one year ago during the Boston bombing. It's simply being called, Chris, a tribute that will take place at the Heinz Convention Center just very close to the steps of where the Boston marathon will end. It will begin at 12:00 noon.

We're told it will open with the Boston pops. That will be followed by a special tribute honoring the four people who lost their lives, Martin Richard, 8 years old, Crystal Campbell, she was 29 years old, former restaurant manager, Lingzi Lu, 23-years-old. You remember her, she is the Boston University grad student from China, and of course, Sean Collier, 27 years old, you remember him, the MIT officer who lost his life after he was ambushed by the suspects.

The mayor, Boston's mayor will be speaking during the tribute as well as Governor Deval Patrick and of course, Vice President Joe Biden will be here as well, Chris, to lend his support. Following the tribute at the convention center then what we're going to see is a flag raising ceremony at the finish line of the Boston marathon and that will be followed by a moment of silence.

Chris, I think one woman summed it up the best in terms of how people are feeling here today. She's the manager at the restaurant where the second bomb exploded. When I talked to her about this city coming together, she said, Jason, today is not a city coming together, it's a community -- Chris. CUOMO: Strong point, Jason, strong point. We both spent a lot of time up there. I was up there yesterday. Everybody is coming together. We saw the mayor walking in and out of shops and people are really trying to get that sense of community.

It will be very needed -- the words "Boston Strong" are everywhere you look. Part of that is because when one is taken many feel the loss.

Coming up on the show, you're going to meet a grandma you will never forget. We met her last year after her granddaughter was killed in the bombings. A year later, she shares what the family was dealt with since Crystal was taken and the sign she says she has received from her beloved granddaughter. Grandma Lillian will make your morning.

Five days of scathing cross-examination in the Oscar Pistorius murder trial come to an end. The prosecution finished its grilling of the Olympian by slamming his story of events. Pistorius says he mistook his girlfriend Reeva Steenkamp for an intruder when he shot her to death. But the state's relentless scrutiny led Pistorius to break down today, saying he is not sure who is to blame for her death.

Obamacare may not drive up health care costs as much as previously thought. New estimates from the Congressional Budget Office and the Joint Committee on Taxation shows premiums are only likely to rise about 3 percent in 2015, far less than many had been predicting.

And the overall cost for implementing the law is expected to run about $5 billion less than expected. But less money and penalties will be collected because the administration decided to delay the employer coverage mandate.

Guess what day it is? It's April 15th, tax day.

CUOMO: What?

PEREIRA: Yes, make the sound. Most people have already filed already. The IRS has gotten 3/4 of the returns it expects to get this tax season. Most have filed electronically.

Now, the agency says do not let that Heartbleed Internet security bug discourage you from filing online. But you do want to beware of a phone scam. Fake IRS agents are calling and asking for your personal information. Do not fall for that.

BOLDUAN: It's already bad enough.

PEREIRA: It's already bad enough.

CUOMO: Don't let that phone bug get to you but that new federal tax rate is quite a bite in the butt cheeks.

PEREIRA: I don't want to end on taxes. I want to leave you --

BOLDUAN: Thank you, Michaela. Do not end on taxes, right?

CUOMO: All right. I feel the love.

PEREIRA: Did you see over night the wonders in the heaven above, the moon in crimson red, the color of blood just hours ago? No biblically prophecy came true, it's a total eclipse. Lots of folks try to rush outside Time Warner Center, couldn't see it because of the clouds.

The Earth passing between the sun and moon, casting a spectacular burnt copper color. If you missed it like many under the cloudy skies, in the east, many more wonders on the way. Three more such blood moons are expected to rise over the next couple years. So, you haven't missed your only opportunity.

Folks in the West, if you're still up this morning, a lot of people in Los Angeles, good morning, they went to the observatory and they had a beautiful view of it. They had clear skies and able to see it.

BOLDUAN: Like a plethora of blood moons this year.

CUOMO: That's huge.

(CROSSTALK)

BOLDUAN: I haven't been able to use that word.

PEREIRA: Turning into a good thing because you're getting freaked out by it yesterday.

BOLDUAN: Can we -- John, can we show that shot again of the blood moon?

CUOMO: Testing our capabilities here on NEW DAY. Ooh! Look at that.

BOLDUAN: I think it's very pretty.

PEREIRA: It's beautiful.

BOLDUAN: It's very beautiful.

CUOMO: The word blood, blood moon.

BOLDUAN: What if we call it a crimson moon?

PEREIRA: Not only that, but think about blood -- without blood, we don't have life, right?

CUOMO: I know.

BOLDUAN: The crimson moon.

CUOMO: I get the spin on. I tell you what, there was -- BOLDUAN: Funny voice every time you say it.

CUOMO: There was almost blood at Cuomo household this morning, because I was looking around, science was with me on this, hey, can you see the moon? I'm looking out the window as I woke up my wife. Why are you looking out the window? I couldn't say I'm looking for the blood moon.

BOLDUAN: For all spouses, let's just say -- no blood moon, no beautiful crimson moon is worth waking up the spouse. Leave Christian's sleep --

PEREIRA: Sleeping spouses must sleep.

CUOMO: I immediately went with the obvious excuse, I can't find cha- cha. She's like, why are you looking out the window? Got to go. Got to go.

BOLDUAN: Got to go.

All right. Coming up next on NEW DAY, the search now depends on an underwater drone scanning the ocean floor. We're going to look at the challenges that the Bluefin-21 is facing.

CUOMO: And we're leaning more about the man who allegedly went on a shooting rampage at two Jewish facilities in Kansas. What watch groups say they've known for years about this guy.

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CUOMO: Welcome back to NEW DAY.

Prosecutors could file hate crime charges against a white supremacist who opened fire at two Jewish facilities in Kansas, taking three lives. Now, the 73-year-old suspect has been described as a raging anti-Semite. This morning, we're learning more about him and more importantly the victims.

CNN's George Howell is in Overland Park, Kansas, this morning -- George.

GEORGE HOWELL, CNN CORRESPONDENT: Chris, he has been described as anti-Semite by the Southern Poverty Law Center, a man who for most of his life has been very vocal, especially online, about his hatred towards Jews. However, officials say of the three people he shot and killed last Sunday and families he terrorized, all were Christians. None of them were Jewish.

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DISPATCHER, OVERLAND PARK POLICE: Four or five shots have been fired into the front door. There's male with a shotgun.

HOWELL (voice-over): The chilling 11 calls as three victims are shot and killed at two different Jewish facilities near Kansas City.

HOWELL: The alleged gunman, Frazier Glenn Cross, also known as Frazier Glenn Miller, a name well-known to the Southern Poverty Law Center which tracks hate groups.

They say he's been long tied to white supremacist groups. Posting hate videos online, expressing anti-Semitic views like in this interview with Howard Stern.

HOWARD STERN, RADIO HOST: What is the biggest problem with the Jews?

FRAZIER GLENN CROSS: They control the government, they control the mass media, they control the Federal Reserve Bank. And with those powers that are committing genocide against the white race.

HOWELL: In the aftermath of it all, we're learning more about the victims. Terri LaManno, occupation a therapist, her family calls a beautiful soul. Fourteen-year-old high school freshman Reat Griffin Underwood who loved to sing. And his grandfather, Dr. William Corporon, who was there to support his grandson -- an incredible loss for a family who has shown so much grace and courage in the face of incomprehensible crime.

UNIDENTIFIED FEMALE: I'm strong because I have faith and I know that god did not do this.

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HOWELL: It's so hard to hear what these families have gone through.

Cross has not yet been formally charged but we do expect to see him face federal hate crime charges filed later this morning -- Kate.

BOLDUAN: We'll obviously watch what happens there. But I think you point out a very important point, George, is to focus on the families, focus on the victims, focus on that daughter and mother who is going through something completely unmanageable right now.

CUOMO: Yes, for all the First Amendment protection we have, what motivated these actions does not deserve a fair hearing.

BOLDUAN: Evil is not OK.

CUOMO: No.

BOLDUAN: Let's turn to some weather now though this morning.

Overnight, extreme weather tearing through the South. Meteorologist Indra Petersons has been tracking it all for us all morning, Indra.

INDRA PETERSONS, AMS METEOROLOGIST: I mean, lot of times when people heard the words "straight line damage from winds" and they don't pay attention as much as they want to hear the word "tornadoes".

But here's exact reason why. We're talking knocked 30 mobile homes overturned from straight line winds yesterday. Thanks to the storm system that's making its way across the country. So, let's talk about where that system right now. Where is that threat?

We're looking at the damage from straight line winds possible from Norfolk, all the way back down through Florence, places like Jacksonville, we're going to have that threat again for severe thunderstorms as all of that energy really kicks up, especially in the afternoon again.

Look at this. Look at the temperature difference. This is the reason we're talking about severe weather. Warm temperatures along the East Coast, but just behind the cold front. Look at the 20s and 30s right now and may want to look the actual snow making its way through, yes, this late in the season, looks like Cincinnati already seeing some soft flurries.

So, here's the frontal system looking for heavy rain in the south, spreading into the northeast, lasting throughout the day. Not clearing out until overnight. Look closer. Even that cold air is filling in bringing in flurries to Philly. Even New York City overnight, the bulk of it, yes, probably 2:00 or 3:00 in the morning, may not even noticed it, but that cold air makes its way down in the Southeast. So, this huge temperature drop makes its way through. Heavy rain will be there.

But more importantly, the cold air, the temperatures drop another 20 degrees by tomorrow. It felt so good for like a day, right?

BOLDUAN: It will be back.

PETERSONS: It will be back.

BOLDUAN: The roller coaster continues.

PETERSONS: I like the positive attitude.

CUOMO: You said the cold was gone. It wasn't coming back.

PETERSONS: When did I say that?

CUOMO: Science.

PETERSONS: Rewind.

CUOMO: Coming up on NEW DAY, too deep. The robot sub going too far, too fast right out of the gate. So, we're going to look at the challenges searchers now face the deeper they have to look.